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While I was driving to the airport a layer of radiation fog condensed and became a pattern-smashing iron plate by flight time. While waiting for tower to cut the next ATIS, I poked around weather forecasts and noticed that the MOS forecast predicted, correctly, low ceilings for the rest of the morning. Argh!

Gemini Sparkle

Key Takeaways:

  • MOS (Model Output Statistics) and LAMP (Localized Aviation MOS Program) provide detailed, airport-specific weather forecasts for approximately 1700 locations that lack official TAFs.
  • These forecasts, derived from broader weather models like GFS, offer hourly predictions for conditions such as ceiling, visibility, and wind, and are accessible via apps like ForeFlight or various NWS online resources.
  • Pilots can leverage MOS/LAMP to validate official forecasts, enhance decision-making at airports without TAFs (especially for applying personal minimums), and improve overall weather situation awareness.
  • While valuable for their granularity, MOS/LAMP do not legally replace official TAFs for flight planning and their accuracy can be compromised by faulty model inputs or highly irregular weather conditions.
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Those extra 30 ponies up front on the mighty Cessna 172SP tend to cause nosewheel landings—at least they do for me—and it was time to go out and knock the rust off my landings to keep the nosewheel safe. I awoke to a sunny morning after showers the previous evening and clicked through the weather while sipping my morning coffee. METAR green, nearest TAFs green, I was ready to go.

While I was driving to the airport a layer of radiation fog condensed and became a pattern-smashing iron plate by flight time. While waiting for tower to cut the next ATIS, I poked around weather forecasts and noticed that the MOS forecast predicted, correctly, low ceilings for the rest of the morning. Argh!

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